Bug 1734178 - Ensure tests within devtools/client/aboutdebugging are https-first compliant r=bomsy

Differential Revision: https://phabricator.services.mozilla.com/D127917

devtools/client/aboutdebugging/test/browser/browser_aboutdebugging_devtoolstoolbox_navigate_back_forward.js

@@ -8,8 +8,8 @@
 // meant that this navigation now leads to a process switch. Unfortunately,
 // about:debugging is not resillient to process switches, so the URLs were
 // changed to both load within the same content process.
-const ORIGINAL_URL = "http://example.com/document-builder.sjs?html=page1";
-const OTHER_URL = "http://example.com/document-builder.sjs?html=page2";
+const ORIGINAL_URL = "https://example.com/document-builder.sjs?html=page1";
+const OTHER_URL = "https://example.com/document-builder.sjs?html=page2";
 
 async function waitForUrl(url, toolbox, browserTab, win) {
   const {